X-ray apparatus.



J. B, WANTZ. X-RAY APPARATUS. APELIcATloN FILED 1m29. 1914.

Patented Sept. 4, 1917.

5 SHEETS-SHEET I.

l W/TNEssEs HTTORNEYS J. B. WANTZ.

X-RAY APPARATUS.

' INVENTOR B.- W TZ TL. im@

HTTo RAIEYS WIT/M5555 J. B. WANTZ.

X-RAY APPARATUS.

APPucATroN FILED 1Aw.29. |914.

Patented ept, 4f, 1917,.

5 SHEETS-SHEET 3.

v:52 Go G2 50 FIG. 7

INVENTOR 'n'rrofflwav "l J. B. WANTZ.

X-RAY APPARATUS.

APPLICATION vFILED IAII.29. |914.

www@ ma. M917.,

5 SHEETS-SHEET 4.

H TTOR NE Y J. B. WANTZ.

X-RAY APPARATUS.

APPLICATION FILED 1AN.29.1914.

Patented Sept. 4, 191'?.

5 SHEETS-SHEET 5 /N VEN T0 R Jal/l- 5 B. Wam fz, QMM- ML Lamm W/TNESSES wilK HTToRn/Em -rn ears rauen unioni.

JULIUS B. WANTZ, OF CHICAGO, ILLINOIS, ASSIGNOR,

BY MESNE ASSIGNMENTS, T0

VICTOR ELECTRIC CORPORATION, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW YORK.

X-RAY .APPARATUS Specification of Letters Patent.

Fatented Sept.. al, 191i 7.

Application filed January 29, 1914. Serial No. 815,201.

To all whom it may concern: p

Be it known that I, JULIUS B. WANTZ, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in X-Ray Apparatus, of which the following is a specification.

My invention relates more particularly to improvements in supporting mechanism for X-ray tubes, one of the features, however, of my invention relating also to the supporting of a fluorescent viewing-screen for use in connection with the X-ray tube.

My primary objects, generally stated, are to provide means forsupporting the X-ray tube in any position desired, and without danger of short-circuiting, for examining a patient, or producing photographs thereof, stereoscopic or otherwise; to provide indicator means whereby when an adjustment of certain parts of the X-ray tube holder are made and the relative positions of the parts disturbed, they may be quickly returned to adjusted position without requiring the entire readjustment of `parts initially made; to provide means on the X-rayV tube holder for supporting a fluorescent screen to be used in connection with the X-ray tube; to provide means on the extremity of the ray-coniining tube for pressing against the body of a patient when necessary to permit the X-ray tube to be positioned at the proper distance from a particular point in the body and displacev tissue which if not displaced would unduly obstruct the rays; to provide improved iinder means to centralize the X-ray tube relative to a particular point in the body; to provide improved means for housing the X-ray tube; and, generally, to so improve upon holders for )Sl-ray tubes that they will be better adapted to the uses for which they are intended.

Referring to the accompanying draw- 1ngs-' v Figure 1 is a view in elevation partly seetional of an X-ray apparatus constructed in accordance with my invention. Fig. 2 is a view in plan of a Huorescent screen-supporting member carried by the standard of the apparatus shown in Fig. 1, said standard being shown in section. Fig. 3 is an enlar ed section taken at the line 3 on Fig. l. an viewed in the direction of the arrow.,

Fig. l is an enlarged section taken at the line 4f on Fig. 1 and viewed in the direction of the arrow. Fig. 5 is a view in elevation of a portion of the mechanism supported from the standard and carrying the holder proper for the X-ray tube, a portion of this mechanism being shown disconnected from the other portion thereof and below the latter, but in direct line therewith, and a part of this view being in section taken atthe line -y on Fig. 6 and viewed in the direction of the arrow. Fig. 6 is a bottom plan view of the mechanism illustrated in Fig. 5. Fig. 7 is a top plan view of the structure shown in Fig. 6. Fig. 8 is a view in elevation of the mechanism shown in Fig. 7, with a shutter, shown in elevation, attached thereto. Figs. 9 and 10 are views of thel opposite sides, respectively, of the shutter device shown in Fig. 8. Fig.` 11 is an enlarged section taken at the line 11 on Fig. 1 and viewed inthe direction of the arrow. Fig. 12 is a perspective view of my improved means for engaging with the body of the patient for positioning the X-ray tube relative to a particular point in the body. Fig. 13 is a view in elevation of the outer end of the ray-conning tube equipped with my improved inder means. Fig. 14 is a view 1n elevation, partly sectional of the improved finder means illustrated in Fig. 13. Fig. 15 is a perspective view ofvmy improved means for housing the X-ray tube; and Fig. 16, a view showing the casing of Fig. 15 applied to the X-ray tube holder mechanism, but with one section of the casing raised.

In the particular illustrated embodiment of my invention, I provide a standard in the form of a hollow cylindrical column 20, extending upwardly from a base 21 supported on rollers 22 and provided with check devices 23, which may be adjusted into position for engaging with the floor on which the base 2 1 rests, to prevent movementy of the apparatus after it has been properly positioned on the floor. umn 20 and movable up and down thereon is a sleeve 24 carrying a hey 25 which slides in a key-way26 in the outer surface of the column 20 and extending longitudinally thereof, whereby the sleeve may be moved up and down on 'the column 20 but is held against rotation thereen.V

Surrounding the colholding the sleeve 24 in vertically adjusted described being position on the column 20, and the sleeve-v section 29 being provided with a set-screw 31 adaptedl to bear against the sleeve 24 for holding the sleeve-section 29 in axially adjusted position about the sleeve 24. The upper end of the sleeve-section 29 is equipped with a pointer 32 carried bya ring -33 having pins 34 which extend into a groove 35 in the section 29, which thus permits the ring 33 with the pointer 32 to be adjusted about the sleeve-section 29, as desired, the purpose of the construction just to provide means whereby after once adjusting the sleeve- 29, either axially or longitudinally of thecolumn 20. or both, it may be returned to adjusted position readily and quickly,I and to this end, I refer to provide on the column 20 a scale, diagrammatically illustrated at 36 in Fig. 1, the pointer 32 cperating with the longitudinal line on the column 20 formed by the key-way 26, and with the vertical graduations thereon.

Extending laterally `of the column 20 is a track 37 formed of parallel bar s 38 square in cross-section and connected together at their opposite ends b'y cross-pieces 39 and 40. The cross-piece 40 is provided with a disk-portion 41 which bears fl'atwise against a similar disk-portion 42 formed'V on the sleeve-section 29, a shaft 43, connected at its inner end with the sleeve-section 29 and extending through an opening 44 inthe disk 4,1, being provided at its outer threaded extremity 45 with a handle-equipped nut 46, the construction just described serving to -rotatably support the track 37 upon the sleeve 29 and afford frictional engagement of these parts for holding the track, and the hereinafter described parts'carried thereby, in any position of axial adjustment about the shaft 43.

At 47 is represented a plateprovided at its center with a circular opening 48, this plate being provided at each of its four corners with a bracket 49 in which brackets, rollers 50 having 'peripheral grooves 51 straddling the inner angular surfaces of the track-bars'38, as shown in Fig. 11, are journaled, whereby the plate 47 is free to be moved lengthwise of the track 37, the plate 47' being equipped with la bracket 52 carrying a set-screw 53, adapted to engage with the adjacent one of the track-bars 38 "for holding the plate 47 and the parts carried thereby in its position of adjustment lengthwise of said track.

' which the lower ends of similar ears 66 car- `readies screws 57, which ass through diametrically-opposed, arc-s "aped slots 58, in the plate 47 By means of these set-screws the ring 54 may be releasably secured in axiallyadjusted position upon the plate 47. Ex-

tending upwardly from the ring 54 are lugs 59 in which parallel rods 60 are fixed at opposite edges of the ring 54, these-rods forming guides for a rectangular frame 61,

provided with lugs 62, slidably engaging the yrods 60, whereby the frame 61 may be adjusted on the ring-member 54.

. One of the rods 60 carries sleeves- 63 slidable thereon' and located beyond the lugs 62. These sleeves are provided with set- 'screws 64 by which they may be gripped to the rod 60 on which they slide, and by their adjustment on this rod, may hold the frame 61 in the position to which it is adjusted lengthwise of the rods 60. l

J The frame 61 is provided at opposite sides with depending ears 65, to the lower ends of ried` by a plate-member 67 are pivoted, as indicated at 68, which thus permits of the rockin of the member 67 on the frame 61. One o the depending ears 66 carries a setscrew 69 which extends through an arc- 100 shaped slot 70 in the adjacent ear 65 and/by` which the plate-section '67, with the' parts carried thereby, `may be held in adjusted position when rocked'on the pivots o8, as hereinbefore stated. The other of the ears 66 is provided with a pin 71 which extends Vthrough an arc-shaped slot 72 in the adjacent ear 65 and connects with a pointer 73 pivotally supported, as indicated at 74, on' the last-referred to ear 65, this pointer cooperating with a scale 75 formed on the frame 61, which is graduated equally in opposite directions from the zero p omt indicated thereon (Fig. 5). Clamping-screwskv 76, adjustable in a slot 77 in the frame 61, 115 are provided for engagement with the pointer 73 so that'by setting the screws 76 in the slot 77, the degree to which the platesection 67 `and the parts carried thereby may portions 83, the underside of the flange 78, thus permitting the disk 79 to be rotated on the plate 67, but preventing accidental separation of these parts. Means are provided for releasably securing the disk 79 in axially adjusted position on the plate 67, these means comprising an upwardly-extending set-screw 84 carried by the platesection 67 and extending upwardly through an arc-shaped slot 85 in the disk 79. The disk 79 carries on its upper side a holder 86 for the X-ray tube 87 which is rmly secured to the disk 79, as through the medium of clamps 88 -in accordance with common practice, the holder 86 being recessed at diametrically opposite sides, as. indicated at 89, to receive the reduced ends of the tube The opposite sides of the disk 79 are provided with extensions 90 which are in line with the recesses 89 and carry clamping devices for engaging the ends of the tube 87 to hold the latter at the desired elevation relative to the disk 79. The form of clamping device illustrated comprises spaced upright rods 91 mounted on the extensions 90, and a pair of blocks 92 cooperating with each set of rods 91 and adjustable thereon for clamping the ends of the tube 87 between them, set-screws 93 on the blocks 92 being provided for holding the latter in adjusted position.

` It will be understoodfrom the foregoingthat in so far as the preceding description is concerned, the following adjustments may made. The sleeve-section 29 being rotatable upon the -sleeve 24 which latter slides u and down on the column 20, the track 37) may be raised and lowered and swung in a horizontal plane to any position desired. The track 37 being rotatably mounted upon the sleeve-section 29, it may be adjusted to any position about its axis of rotation. The plate 47 being connected with the track 37 by the rollers 50, this plate and all the parts carried thereby may be bodily shifted lengthwise of the track 37. The rotatable mounting of the ring 54 on the plate 47 permits this ring and the parts carried thereby to be axially adjusted on the plate 47 byl which the angular relation of the guide-rods 'to the track 37 may be varied, as desired, even to making them parallel. The plate-section 67 being pivotally connected at its lugs 66 with the frame 61, the plate section 67 may be rocked on the pivots 68 from one side to the other, except as restrained by the clamping screws 76 in their preliminarily set position; and the disk 79 beingrotatably mounted on the plate-section 67, this disk which supports the holder in which the lamp 87 is mounted may be rotated on the plate-section 67 for the purpose hereinafter stated.

It will be readily understood that bv the various adjustments provided the holder 86 may be caused to present a wide variation of positions, not only those required for the making of stereoscopic photographs as well as those of other kinds, but also those required for examining a patient. A particularly desirable feature of my apparatus is that of so mount-ing the holder for the X-ray tube that it may be swung from one side to the other on its horizontal pivots 68 regardless of the adjustment of the support for these pivots in a horizontal plane, this feature being especially desirable in stereoscopic work.

It often becomes desirable after adjusting the sleeve-sections 24 and 29 on the column 20, to swing the track 37 and the parts carried thereby out of adjusted position preliminary to returning them to adjusted position, and to obviate the necessity of repeating the steps necessary to be taken for /making an initial adjustment, the pointer 32 is provided. When the operator has adjusted the sleeve-sections 24 and 29 to the desired positions, he turns the ring 33 on the sleeve 24 until the pointer 32 coincides with the key-way 26, thereupon tightening the set-screw 34. By noting the particular graduation on the column 20 opposite to which the pointer 32 extends, the operator, should it become desirable to disturb the adjustment of the sleeves 24 and 29 on the column 20, may readily readjust these sleeves on the column 20 by swinging them to a position in which the pointer 32 will line up with the key-way and register with the'particular graduation of the scale 26 with which it registered in the initial adjustment.

In order that the devices through the medium of which the lamp 87 is supported on the column 20, may be raised and lowered with ease, I provide a counterweight 94 which is located preferably in the column 20 and connects with a cable 95 which extends upwardly over a pulley 96 and connects at its opposite end with an eye 97 on the portion 27 of the sleeve 24; and to faciliv tate the axial adjustment of the track 37 and the parts carried thereby, on the sleevesection 29, I provide a handle device which in the preferred tconstruction illustrated comprises a handle 98 provided with forkedarms 99 at which it is adapted to be applied to either end of the mechanism which operates on thetrack 37, set-screws 100 being provided for this purpose.

The preferred embodiment of my invention includes means for supporting a fluorescent screen in proper relation to the X-ray -tube for the purpose of examining a patient, the means shown for this purpose comprising an angle-shaped frame work 101 connected near one end with a clamp device 102 secured on the upper end of the column 20. The frame 101 carries two pulleys 103 and '1033 which are spaced apart and over which cords 104 and 105 extend, the cords at their depending ends being' adapted to be connected with a fluorescent screen 106 .and the ,pulleys 103 and 103a so disposed that the screen 106 when extending in the same or substantially the samehorizontal plane as the tube 87, will directly oppose the latter. 'Ihe other ends of the cords 104 and 105 pass over a double pulley 107 and thence over pulleys 108 and 109, respectively, on

'the frame work 101, these ends of the cords 104 and 105 being united and engaging a pulley 110 connected with a counterweight 111, thus supporting the latter from these cables, the counterweight 111 being preferably of such weight as will cause the screen .A 106 to be maintained in any vertical position into which it is moved by the operator; it being understood that when the screen 106 x is used, the track 37 would beV axially rosection 112 adapted to b e releasably oonj dium of a leverA 117,

' that in which the plates 116 move.

`ters 116 and 122, as heretofore nected with the plate 47 through the medium of shouldered pins 113 and a set-screw 114. The plate 112 contains a central opening 115 which registers with the openings 80 and 81 in the disk 79 and plate-section 67, respectively. At one side ofthe plate 112 is a pair of shutter plates 116 adapted to be moved toward and away from each other over the openin 115 through the mecrume'd at 117a and having oppositely extending arms 118 which are plvotally connected as indicated at 119 with bars 120 guided by rollers 121 'and to which the plates 116 are secured. At the opposite side of the plate 112 are'lshutter /plates 122 which are movable toward and away from each other across the opening 115, but in a direction at right angles to v e means for operating the plates 122 comprise a lever 123 fulcrumed to the plate 112 as indicated at 124 and pivotally connected at opposite sides of its fulcruln,` as indicated at 1,25, with bars 126 guidedly confined between rollers 127 and carrying the plates 122.

It will be' understood from the foregoing that the size and shape of the opening produced by the shutter device may be variedl as desired by adjusting the respective shutescribed. It is customary in the use of X-ray a paratus to vprovide a ray-confining tu e through which the X-rays are projected into the patient, such a tube being represented at 128 and connected with the platesection 67 in any suitable manner, as by a bayonet-joint connection with the pins 128". In using X-ray apparatus, it is necessary that the tube occupy a certain position relative to the part of the body to be viewed or to be`photographed, and this oftentimes makes necessary lthe pressing of the tube 128 firmly against the body of the patient. In order that such pressure may be applied to the best advantage, I provide the outer endof the tube 128 with a member 129 of such material that the X-rays will penetrate it, as, for example, aluminum, the member 129 bein preferably rounded, as indicated, and pre erably detachably connected with the tube 128 as through the medium vof sprin clips 130.

my invention, I have provided means for forcing against the body of the patient that portion of the apparatus which vin practice engages therewith, where this practice is at its teeth 135 with a gear 136 journaled in the ears 134 and connected with a. vhandleportion 137.

In the use of the apparatus, after the tube 87 has been ,adjusted relative to the body of the patient, the operator tightens up the setscrew 138 on the sleeve 131 for gripping this sleeve to the column, and the gear 136 to draw the sleeve-sections 24 'and 29 and the parts carried thereby, downwardly to cause the tube 128 or the member 129, as the case may be, to be forced with the desired pressure against the body of the patient.

Another feature of my invention is that of providing a finder device illustrated in Figs. 13 and 14 for aiding the centering'of the' tube 128 relative to the part of the body into which the X-rays are to be projected. The preferred form of these means comprises by turmng- Van open-work plate 139 provided-with clips 140 at whichiit is adapted to be releasablyl secured to the outer end of the tube 128. Se-

cured in a sleeve 141 on the frame 139 is a tube 142 with which telescopes arod 143, the inner end of this rod being split, as indicated at 144, to provide frictional engagement between these telescoping parts. It will be readily understood that by adjusting the rod 143 in the tubel42, to cause the outer extremity of this rodto approach the body of the patient, the tube'128 may be accu-v 85 In t e preferred illustrated embodiment of i rately centered relative to any particular point on the body of the patient.

It is desirable that the operator be shielded as much as possible from the rays issuing from the X-ray tube 87, and that illumination of the room from the tube be prevented in the case of makg X-rayexaminations, and to' this end I have devised, as an adjunct to a support for such a tube, a form of casing which may be readily applied to and removed from the support, and which, when in position thereon, will serve to accomplish these results. My improved casing is represented in Figs. 15 and 16, and, as shown, it is formed of two similar sections 145 and 146 of material opaque to illuminating rays and preferably X-rays and hinged together, as indicated at 147, at their upper edges, and provided at opposite ends with latch devices 148 (one only of which is shown) for holding the casing-sections together. The top of the casing preferably contains an opening 149 and at its bottom is apertured, as

indicated at 150, at which aperture it surrounds the plate-section 67, the casing being held in position on the disk 79 through the medium of spring-clips 151 adapted to rest upon the upper side of this disk. The binding-posts 152 of the tube 87 are preferably connected with springs 153 secured to binding-posts 154 on the casing, the wires (not shown) for conducting induced current, from any suitable source thereof, to the tube 87, connecting with the binding-posts 154.

It will be noted that by revolubly mounting the disk79 on the plate-section 67, the tube 87 may be caused to extend at substantially right angles to the direction in which the current conducting wires connected therewith extend, regardless of the adjustments made of the other elements carried by the track 37, this being of advantage as it is necessary, owing to the high intensity of the current usedfor operating the tube 87, that the current-conducting wires be held a relatively great distance apart at all times.

The counter-weight 94 is shown in Fig. 1l as relatively close to the lower end of the column, it being so shown in order that it the guideways 37 are will non confuse the other details of the structure shown in this figure. In practice, however, when the tube-support of which a part, is at the elevation shown in this gure, the counter- Weight would extend at a considerably higher distance than that shown, in order that the tube-support might be counter- `weighted throughout its desired movement up and down along thecolumn.

While I have illustrated and described a particular embodiment of my invention, I do not wish to be understood as intending to limit it thereto, as the same may be variously modified and altered without departing from the spi-rit of my invention, it being `my intention to claim my invention as broadly and fully as the prior state of the art will permit. f

What I claim as new and desire to secure by Letters Patent is- 1. In X-ray apparatus, the combination of a column, a sleeve slidable longitudinally thereon, means holding said sleeve against rotation, a second sleeve surrounding and journaled on said rst-named sleeve and held against longitudinal movement thereon, a guide-way rotatably mounted on said second-named sleeve, and a tube-supporting member mounted and slidable on said guideway.

2. In X-ray apparatus, the combination of a column, a sleeve slidable longitudinally thereon, means holding said sleeve against rotation, a second sleeve surrounding and journaled on said first-named sleeve and held against longitudinal movement thereon, a guide-way rotatably mounted on said second-named sleeve, a tube-supporting member pivotally mounted and slidable on said guide-way, and adjustable means for limiting the tilting of said holder device.

3. In X-ray apparatus, the combination of a column, a member surrounding said column and adjustable up and down thereon and about the axis of said column, and'carr ing guide-ways laterally projecting therefi'om and spaced apart, a slide member engaging said guide-ways and movable lengthwise thereof, a holder-device for an X-ray tube pivotally mounted von said slide member, the pivot of said holder device extending transversely of said guide-ways, and counterbalancing means for said member constructed and arranged to permit the latter to be adjusted up and d'own, and about, said column. v

4. In X-ray apparatus, the combination of a column, a member surrounding said column and adjustable up and down thereon, and about the axis of said column and carrying guide-ways laterally projecting therefrom and spaced apart, said guide-ways being pivotally supported on said member with the axis of said pivot extending at an angle to said column, a slide-member engaging said guide-ways and movable lengthwise thereof, a holder-device for an X-ray tube pivotally mounted on said slide-mem` ber, the pivot of said holder-device extending. transversely of said guide-ways, and counter-balancing meansl for said rstnamed member constructed and arranged to permit the latter to be adjusted up and down, and about, said column.

5. In X-ray apparatus, the combination of a column, a member surrounding said column and adjustable up and down thereon,

and about the axis of said column and carryof the latter, a holder-device for an X-ray tube pivotally connected with said lastnamed member, the pivot of said holderdevice extending transversely of said guide,

and counter-balancing means for said irstnamed member constructed and arranged to ermit the latter to be adjusted up and down, and about, said column.

6. In X-ray apparatus, the combination of an upright support, a laterally-extending member on said support having guide-Ways spaced apart, a member engaging said guide- Ways and adjustablelengthwise of the lat-- ter, a second member axially adjustable on said first named member With said axis at an angle to said guide-Ways, and a third member pivotally supported on said second member, for the purpose set forth.

7. In X-ray apparatus, the combination of an upright support, a laterally-extending member adjustably mounted on said support and having guide-Ways 'spaced apart, a member engaging said guide-Ways and adjustable lengthwise of the latter, a third member axially adjustable on said second named member with said axis at an angle to` said guide-Ways, and a fourth member pivotally supported on said third member,

for the purpose set forth.

8. In X-ray apparatus, the combination of an upright support, a laterally-extending member mounted on said support and having guide-Ways spaced apart, `a second member adjustable on said guide-Ways, a third member axially adjustable on said second member, a fourth member lineally adjustable'on said third member, and a fthv member pivotally connected with said fourth member.- Y

9: In X-ray apparatus, the combination of an uprightsupport, a laterally-extending member adjustably mounted on said support and having guide-Ways spaced apart, a second member adjustable on said guidevvays, a third member axially adjustable on said second member, with said axis at an angle to said guide-Ways, "a fourth member 'lineally adjustable on said third member,"

and a fifth member pivotally connected with said fourth member.

10. In X-ray apparatus, the combination i of an upright support, a laterally-extending member mounted on said support and having guide-ways spaced apart, a second member engaging said ide-ways andl adjustable 'l ngthwise of t e latter, a third member la ally adjustable on said second mem- -,bcr, a fourth member lineally adjustable (on 'said third member, a fifth member ivotailly connected with said fourth mem er, and a sixth member axially adjustable 011 said -ifth member.

- 11. In X-ray apparatus, the combination o5 of an upright support, a laterally-projecting `Way, a second. member axiallyadjustable on said first member, With said axis at an angle to said guide-Way, a third member lineally adjustable on saidsecond member, a fourth. member pivotally connected with said third member, and a fth member axially adjustable on said fourth member with said axis at an angle to said guide-Way.

l2. In X-ray apparatus, the combination of an upright support, a laterally-projecting guide-Way adjustably supported ,on said support and axially adjustable thereon in a vertical plane, a member engaging said guide-Way, a second member axially adjustable on said first member and carrying guide-means with said axis at an angleto said guide-means, a third member engaging said guide-means and shiftable thereon, a fourth member pivotally lconnected with said third member, and a fth member of an upright support, a laterally-projecting j uide-way mounted onk said support and ormed'vvith spaced guide-portions, a member engaging said guide-portions, a ring vaxially adjustable on said first-named member and carrying guide-means -With said axis at an angle to said guide-means, a second member en aging said guide means and provided With epending lugs, a third member located Within said second member and having depending lugs intermediate its sides pivotally connected with the lugs on said second member, and a fourth member axially vadjustable on said third member With said axis at an angle to said guide-Way.

14. In X-ray apparatus, the combination of an upright support, an X-ray tube-supporting-member mounted on said support,

a sleeve beyond said supporting-member, means for releasably clamping said sleeve to said support, a rack connected With one of said members on said support, and a gear j on the other of said members engaging with,

said rack, for the purpose set forth.

15. In X-ray apparatus, the combinationof an upright support, a laterally-extending tube-supportingv member mounted on said support-to be adjusted up and down thereon and about the latter, and indicator means bn said member adjustable about the j axis of the latter and coperatingvwith said support for indicating' the height at which said member extends, 4for the 4purpose set forth.

on said member comprismg a ring surroundtiti ortion of said member and axially adjusta le thereon, and a pointer carried by said ring and coperating with said support, for the purpose set forth.

l In X-ray apparatus, the combination of an upright column, a sleeve surrounding said column and adjustable in axial and longitudinal directions, an X-ray tube-hold ing device extending laterally from and supported by said sleeve, a ring-shaped member surrounding said sleeve and axially adjustable thereon, and a pointer carried by said sleeve and coperating With markings on said column, for the purpose set forth.

18. The combination of a support for an X-ray tube including a member having a section transparent to X-rays'adapted to support a tube and a removable and replaceable casing opaque to illuminating rays and adapted to surround the tube and containing an opening registering With said transparent section, and means releasably securing said casing to said member.

ing a 19. The combination of a support for an -ray tube including a supporting member having a section transparent -to X-rays and adapted to support a tube, a removable and replaceable casing opaque to illuminating'and X-rays and adapted to surround the tube and containing an opening registering vvith said transparent section, and means releasably securing said casing to said member.

20. The combination of an X-ray tube support including a support, a plate carried by said support and adapted to support a tube and containing a section transparent to X-rays, an apertured casing of material opaque to illuminating rays and supported on said plate and adapted to surround an -ray tube supported thereon and registering at its aperture with Vsaid transparent section, and means releasably securing said casing to said member. j

2l.- In X-ray apparatus, the combination of an X-ray tube-holder, a member supported to radiate from the tube, and a presser member extending across the end of said first-named member and formed of material transparent to X-rays.

22. ln X-ray apparatus, the combination of an X-ray tube holder, a suitably supported ray-confining tube secured to said holder, and a presser member extending across the outer end of said tube and formed y of material transparent to X-ray's.

23. In X-ray apparatus, the combination of an X-ray tube-holder, a member supported toradiate from the tube, and a presser-member ofgeneral semi-spherical contour secured to the outer end of said first-named member and formed of material transparent to X-rays.

24. ln X-ray apparatus, the combination or means for supporting an X-ray tube, a

relatively stift' finder device, and means for supporting said device on said first-named means to cause said .finder device to project in radial direction from said tube.

25. ln X-ray apparatus, the combination of means for supporting an X-ray tube, a finder device formed of relatively adjustable members, and means for supporting said finder device on said first-named means to cause said nder device to project in radial direction from said tube.

26. In X-ray apparatus, the combination of means for supporting an X-ray tube, a finder device formed of telescoping sections, and means for supporting the said finder device on said first-named means to cause said finder device to project in radial direction from said tube.

27. ln X-ray apparatus, the combination of an X-ray tube holder, a suitably supported ray-confining tube secured to said holder, and a presser member of vgeneral semi-spherical form secured to the outer end of said ray-confining tube and formed of material transparent to X-rays.

28. In X-ray apparatus, the combination of means for supporting an X-ray tube, a' suitably supported ray-coniining tube, a finder device formed of relatively adjustable, relatively stiff members, and means for securing said finder device on the outer end of said ray-confining tube for holding said nder device in fixed position relative to said ray-confining tube regardless of the tilting of the latter.

29. ln X-ray apparatus, the combination .of. means for supporting an X-ray tube, a

suitably supported ray-confining tube, a finder device formed of relatively stid' telescoping members, and means for securing said finder device on the outer end of said ray-confining tube for holding said finder device in fixed position relative to said rayconfining tube regardless of the tilting of the latter.

30. ln apparatus of the character set forth, the combination of a support, a fluorescent screen supported thereby to extend 'at one side of said support, an X-ray tube holder mounted on said support to extend at one side thereof and opposite said screen and having free universal movement in a vertical plane relative to said screen.

3l. In apparatus of the character set forth, the combination of a support, a iinorescent screen supported thereby to extend at one side of said support and movable toI forth, the combination of a support, afluforth, the combination of an upright sup-f port, an X-ray tube holder on said support,

a member of general L-shape mounted intermediate the ends of one of its arms on said l support in substantially horizontal position,

a fluorescent screen, and counter-weight mechanism on said arm for said screen, the flexible members of said mechanism arranged on said arm to support said screen from the other arm of said L-shaped member at one side of said support, and posi- Ation the counter-weight of said mechanism `i`n the other arm of said member.

34. In X-ray apparatus, the combination. of a supporting member, means on said member for supporting an X-ray` tube; a

laterally-projectin extension on said member of general L-s ape, a cord, or the like, engaging said extension with its free ends spaced apart, and depending from said -extension near one end thereof for connection "with a iiuorescent screen, the portion of the cord, intermediate its' ends being positioned near the other end of the extension, and a Vcounter-weight threaded on said cord to permit the latter to'slide therethrough, engaging said cord at the portion thereof adjacent the last referred to end of said extension.

35. In X-ray apparatus, the combination. of an upright support, a laterally-extending guide-way on said support, a member movable along said guide-way, a second member rotatable on said rst named member in a plane substantially parallel with said guideway, and an X-ray-tube-holding-member pivoted on said last named member to rock thereonvin planes at angles to said guideway.

36. In X-ray apparatus, the combination of a column, a memberlongitudinally movable along said column, means for holding said member in adjusted position, a second member rotatable on said column and adjustable longitudinally of the latter and bearing-against said first named member, means for securing said second named member in axially adjusted positionon said column, and means for supporting an X-ray tube on said second member. y

37. In X-ray apparatus, the combination of a column, a member longitudinally movable alon said column,^means for holding said meml er in? adjusted position, a second justable longitudinally of the latter and bearing against, said first named member,

means for securing said second named memi ber in axially adjusted position on said column, aguide-way mounted on said second member and extending-laterally therefrom,

and an X-ray tube-holder mounted, and

slidable on, said guide-way toward and away from said column.

38. In X-ray apparatus, the combination of a'column, a member longitudinally movable alon said column, .means for holding said mem er inV adjusted position, a second member rotatableon said column and adjustable longitudinally of the latter and bearing against said first named member, means for securing said second named member in a'xially adjusted position on said colunm, a guide-way rotatablyl mounted on said second member and extending laterally therefrom, and an X-ray tube-holder mounted, and slidable on, said and away from said column.

39. In X-ray apparatus, the combination ,of an upright support, a laterally-extending guide-way on said support, a member mov-` guide-way toward,

able along said guide-way lengthwise of the l latter, and an X-ray-tube-supporting-member axially adjustable on said firstV named member about an axissubstantially co-incident with the center of a tube on said tubesupporting-member.

40. In X-ray apparatus, the combination of an upright support, a laterally-extending guide-way on said support, a member movable along said guide-waylengthwise of the latter, a second' member axially adjustable about said first named member, and an X- ray-tube-supporting-member pivotedon. said second member, the axis about which said second member rotates being substantially co-in'cident with the center of a tube on the tube-supporting-member. j 1

41. In X-ray apparatus, the. combination of an upright support, a laterally-extending guide-way pivoted on vsaid support, with its axis at an angle to said support, a member movable along said guide-way lengthwise of the latter, and an X-ray-tube-supportingmember axially adjustable on 'said first named member about an axis substantially co-incident with the center of a tubesup- X-ray-tube-supporting-member ypivoted on said second member, the axis about which said second member rotates being substan-A tially co-incident with the center of a tube on the tube-supporting member.

43. In X-ray apparatus, the combination of an upright support, a laterally-extending guide-way on said support, a member movable along said guide-way lengthwise of the latter, a second member axially adjustable on said first named member and provided with guide means, a third member engaging said guide means and adjustable lineally thereon, and a fourth, X-ray-tube-holdingmember pivot-ally connected with said third member, the axis about which said second member is adjustable being substantially coincident with the center of a tube positioned on said fourth member.

44. In X-ray apparatus, the combination of a column, a member surrounding said column and adjustable up and down thereon, and about the axis of said column, a laterally projecting guideway pivoted on said member to rotate thereon on an axis at an angle to said column, a second X-raytube supporting member engaging said guide-way and movable therewith about said axis, said guide-wayI being constructed and arranged to afford movement of said second member along said guide-way in the different axial adjustments of the latter, and counter-balancing means for said firstnamed member constructed and arranged to permit the latter to be adjusted up and down, and about, said column.

45. In X-ray apparatus, the combination of a column, a member surrounding said column and adjustable up and down thereon, and about the axis of said column and carrying' laterally projecting guide-ways spaced apart, a second member engaging said guide-ways and movable along the latter and provided with means for supporting an X-ray tube in a position opposite the space between said guide-Ways, and counterbalancing means for said first-named member constructed and arranged to permit the latter` to be adjusted up and down, and about, said column.

46. In X-ray apparatus, the combination of a column, a member surrounding said column and adjustable up and down there-l on, and about the axis of said column and having laterally projecting guide-ways spaced apart, a second member engaging said guide-ways and movable along the latter, a third member pivoted on said second member on an axis in a plane substantially parallel with the plane in which said guideways extend and provided with means forsupporting an X-ray tube in a position opposite the space between sa1d guide-ways, and counter-balancing means for said firstnamed member constructed and arranged to permit the latter to be adjusted up and down, and about, said column.

47. In X-ray apparatus, the combination of a column, a member surrounding said column and adjustable up and down thereon, and about the axis of said column, a laterally extending guide member on said first-named member and adjustable thereon about a substantially horizontal axis, a third member adapted to support an X-ray tube, means for supporting said third member on said second-named member to cause said third member to be adjusted with the latter about the axis and have movement along said second-named member in the diierent axial adjustments of said members, while being held by said second-named member in said axial adjusted position, and counterbalancing means for said first-named member constructed and arranged to permit the latter to be adjusted up and down, and about, said column.

48. In X-ray apparatus, the combination of a column, a member surrounding said column and adjustable up and down thereon, and about the axis of said column, a

laterally extending member on said irst,

named member and adjustable thereon about a substantially horizontal axis, said secondmember having guide-ways spaced apart and extending lengthwise thereon, an X-raytube supporting member engaging said guide-ways and movable lengthwise thereof, means whereby said third-named member moves with said second-named member in the axial adjustment of the latter and per-l mits movement of said third-named mem- YAber along said second-named member in the different axial adjustments of said members, and counter-balancing means for said firstnamed member constructed and arranged to permit the latter to be adjusted up and down, and about, said column.

49. In X-ray apparatus, the combination of a column, a member surrounding said' column and adjustable up and down thereon, and about the axis of said column, a guide-way rotatably mounted on said member on an axis extending at an angle to said column to extend laterally of said column With said axis extending parallel with said guide-way, a tube-supporting member mounted, and slidable on, said guide-way, toward, and away from said column, and counter-balancing means for said firstnamed member constructed and arranged to permit said member to down, and about, said column.

J ULIUS B. WANTZ.

In presence of D. C. THoRsEN, O. G. AvIsUs.

be adjusted up and 

